:root {
  --ku-green: #006664;
  --ku-green-deep: #014846;
  --blue-deep: #14335a;
  --ink: #1c3134;
  --muted: #617476;
  --line: rgba(0, 102, 100, 0.12);
  --shadow: 0 26px 70px rgba(0, 68, 67, 0.08);
  --hero-title-max: 15ch;
  --hero-subtitle-max: 60rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Sarabun", "Noto Sans Thai", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(239, 200, 74, 0.16), transparent 24rem),
    linear-gradient(180deg, #fffdf9 0%, #f5efe4 100%);
}

a { color: inherit; text-decoration: none; }

.page {
  width: min(1220px, calc(100vw - 28px));
  margin: 20px auto 36px;
}

.frame {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 32px;
  background: rgba(255, 253, 248, 0.84);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.inner { padding: 24px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 4px 2px 24px;
}

.site-label {
  color: var(--ku-green);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.site-label span {
  display: block;
  line-height: 1.25;
}

.site-label span:first-child {
  font-size: 1.18em;
  font-weight: 700;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  transition: 160ms ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  background: rgba(0, 102, 100, 0.08);
  color: var(--ku-green-deep);
}

.hero {
  padding: 28px 2px 10px;
}

.hero-kicker {
  color: var(--ku-green);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
  font-weight: 600;
}

h1 {
  margin: 16px 0 0;
  max-width: var(--hero-title-max);
  color: var(--blue-deep);
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
  font-weight: 700;
}

.hero-subtitle {
  max-width: var(--hero-subtitle-max);
  margin-top: 22px;
  color: #213032;
  font-size: clamp(1.04rem, 1.35vw, 1.15rem);
  line-height: 1.85;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(0, 102, 100, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  color: var(--ku-green-deep);
  font-size: 0.94rem;
}

.section {
  padding: 30px 2px 0;
}

.section-title {
  color: var(--ku-green-deep);
  font-size: 1.14rem;
  font-weight: 600;
}

.rewrite-title {
  margin-top: 14px;
  margin-bottom: 22px;
  color: var(--blue-deep);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.content-panel,
.reference-panel {
  margin-top: 18px;
  padding: 30px 32px;
  border: 1px solid rgba(0, 102, 100, 0.1);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.56);
}

.lead-split {
  display: grid;
  grid-template-columns: minmax(360px, 1.08fr) minmax(300px, 0.92fr);
  gap: 28px 34px;
  align-items: start;
  margin-top: 18px;
  margin-bottom: 12px;
}

.lead-figure {
  margin: 0;
}

.figure-link {
  display: block;
  cursor: zoom-in;
}

.post-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 22px;
  border: 1px solid rgba(0, 102, 100, 0.08);
  background: #eef4f1;
}

.figure-caption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.intro-copy p {
  max-width: none;
  margin-bottom: 20px;
  font-size: clamp(1.08rem, 1.2vw, 1.2rem);
  line-height: 1.95;
}

.intro-copy p:last-child {
  margin-bottom: 0;
}

.content-panel p {
  margin: 0 0 20px;
  max-width: 62rem;
  color: #263537;
  line-height: 2;
  font-size: 1.06rem;
}

.content-panel.is-interactive {
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.content-panel.is-interactive:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 102, 100, 0.18);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 18px 38px rgba(0, 68, 67, 0.08);
}

.content-panel p:last-child {
  margin-bottom: 0;
}

.content-panel h2 {
  margin: 34px 0 14px;
  color: var(--blue-deep);
  font-size: clamp(1.22rem, 1.8vw, 1.5rem);
  line-height: 1.28;
}

.read-more-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  max-width: 64rem;
  margin: 8px 0 22px;
  padding: 20px;
  border: 1px solid rgba(0, 102, 100, 0.18);
  border-left: 6px solid var(--accent);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255, 248, 219, 0.96), rgba(230, 248, 246, 0.94));
  box-shadow: 0 16px 34px rgba(0, 68, 67, 0.12);
  text-decoration: none;
}

.read-more-callout strong {
  display: block;
  color: var(--blue-deep);
  font-size: clamp(1.12rem, 1.5vw, 1.32rem);
  line-height: 1.45;
}

.read-more-copy > span:last-child {
  display: block;
  margin-top: 8px;
  color: #314143;
  line-height: 1.75;
}

.read-more-kicker {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.read-more-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--blue-deep);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 10px 20px rgba(20, 51, 90, 0.22);
}

.read-more-callout:visited .read-more-button,
.read-more-callout:hover .read-more-button,
.read-more-callout:focus-visible .read-more-button {
  color: #ffffff;
}

.read-more-callout:hover .read-more-button,
.read-more-callout:focus-visible .read-more-button {
  border: 2px solid var(--blue-deep);
  background: var(--accent);
  color: var(--blue-deep);
  box-shadow: 0 12px 24px rgba(239, 200, 74, 0.28);
}

.content-panel ul {
  margin: 0 0 18px;
  padding-left: 20px;
  color: #263537;
  line-height: 1.9;
}

.reference-list {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.reference-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  background: #1877f2;
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(0, 102, 100, 0.08);
  color: var(--ku-green-deep);
  font-size: 0.88rem;
}

.key-term {
  font-weight: 400;
  color: inherit;
  transition: color 180ms ease, font-weight 180ms ease;
}

.content-panel.is-interactive:hover .key-term {
  color: var(--ku-green);
  font-weight: 700;
}

.original-text {
  margin-top: 14px;
  padding: 18px;
  border-radius: 22px;
  background: #f8f4eb;
  color: #243537;
  line-height: 1.78;
  white-space: pre-wrap;
}

.original-toggle {
  margin-top: 18px;
  border: 1px solid rgba(0, 102, 100, 0.1);
  border-radius: 22px;
  background: #fcfaf4;
  overflow: hidden;
}

.original-toggle summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 18px;
  color: var(--blue-deep);
  font-weight: 600;
}

.original-toggle summary::-webkit-details-marker {
  display: none;
}

.original-toggle summary::after {
  content: "เปิดดู";
  float: right;
  color: var(--ku-green);
  font-size: 0.92rem;
  font-weight: 600;
}

.original-toggle[open] summary::after {
  content: "ย่อกลับ";
}

.related-grid {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.related-card {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 18px;
  border: 1px solid rgba(0, 102, 100, 0.1);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.5);
}

.related-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center;
  border-radius: 16px;
  border: 1px solid rgba(0, 102, 100, 0.08);
  background: #ffffff;
}

.related-copy {
  min-width: 0;
}

.related-card h3 {
  margin: 0;
  color: var(--blue-deep);
  font-size: 1.15rem;
  line-height: 1.35;
}

.related-card p {
  margin: 10px 0 0;
  color: #314143;
  line-height: 1.8;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(11, 22, 28, 0.78);
  backdrop-filter: blur(6px);
}

.lightbox.is-open {
  display: flex;
}

.lightbox-dialog {
  position: relative;
  width: min(96vw, 1320px);
  max-height: 92vh;
  padding: 14px;
  border-radius: 26px;
  background: rgba(255, 253, 248, 0.96);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
}

.lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  background: rgba(20, 51, 90, 0.9);
  color: #fff;
  font: inherit;
  font-size: 1.2rem;
  cursor: pointer;
}

.lightbox-image {
  display: block;
  width: 100%;
  max-height: calc(92vh - 28px);
  object-fit: contain;
  border-radius: 18px;
  background: #fff;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 16px;
  padding: 28px 2px 4px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 720px) {
  .page {
    width: min(1220px, calc(100vw - 16px));
    margin-top: 8px;
  }

  .frame { border-radius: 22px; }
  .inner { padding: 16px; }

  .topbar,
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .content-panel,
  .reference-panel {
    padding: 22px 20px;
  }

  .lead-split {
    grid-template-columns: 1fr;
    gap: 18px;
    margin-top: 14px;
  }

  .lead-figure {
    width: 100%;
  }

  .related-card {
    grid-template-columns: 1fr;
  }

  .read-more-callout {
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .read-more-button {
    width: 100%;
  }

  h1 { font-size: clamp(2.2rem, 12vw, 3.6rem); }
}